Home / 15,403.61-21,257.11-8,505.00

Finding the Fourth Proportional to 15,403.61, 21,257.11 and 8,505.00

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Solution

The fourth proportional to 15,403.61, 21,257.11 and 8,505.00 is: 11,736.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.61 : 21,257.11 = 8,505.00 : x
  2. Step 2: Convert to fraction form
    15,403.61/21,257.11 = 8,505.00/x
  3. Step 3: Cross multiply
    15,403.61x = 21,257.11 × 8,505.00
  4. Step 4: Simplify right side
    15,403.61x = 180,791,571.74
  5. Step 5: Solve for x
    x = 180,791,571.74/15,403.61
  6. Step 6: Final answer
    x = 11,736.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.